chem

at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??

  1. 👍 0
  2. 👎 0
  3. 👁 375
  1. PH2O = Xsoln*PoH2O
    10% urea = 10g urea/(10g urea+90g H2O)
    moles urea = grams/molar mass urea.
    moles H2O = grams/molar mass H2O.
    XH2O = moles H2O/total moles.
    Then plug this X for H2O into the equation at the top, multiply by 55.3 mm.

    1. 👍 0
    2. 👎 0
  2. The first equation should read this way.
    Psoln = XH2O*PoH2O

    1. 👍 0
    2. 👎 1

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Vapour pressure of benzene and toluene are 0.9bar and 0.85bar. 7.8g of benzene is added to 180g of toluene. To find the vapour pressure of the resultant solution

    asked by Isha on January 12, 2020
  2. PCB

    A 298k the vapour pressure of water is 23.75mmhg.calculate the vapour pressure at same tempreature over 5% aqurous solution of urea?

    asked by Chavi on April 24, 2017
  3. physics

    A closed inexpansible vessel contains air saturated with water vapour at 77 degree Celsius.The total pressure in the vessel is 1007mmHg.Calculate the new pressure if the temperature is reduced at 27 degree Celsius (S.V.P of water

    asked by ada on October 22, 2017
  4. Physics

    A closed inexpansible vessel contains air saturated with water vapour at 77 degree Celcius. The total pressure of the vessel is 1007mmHg. Calculate the new pressure if the temperature is reduced to 27 degree celcius. (svp water at

    asked by Shredder on February 27, 2016
  1. Chemistry

    What is the equilibrium partial pressure of water vapor above a mixture of 37.5 g H2O and 62.5 g HOCH2CH2OH at 55 degree C. The partial pressure of water at 55 degree C is 118.0 mm Hg. Assume ideal behavior for the solution.

    asked by Nurcan on February 19, 2012
  2. Science

    The vapour pressure of solution having 2 grams of solute X (molar mass-32) in 100 grans of CS2 (vapour pressure-854 torr) is 848.9 torr. The molecular formula of the solute is ?

    asked by Ritika on April 26, 2017
  3. chemistry

    50cm3 of hydrogen is collected over water at 17 degree celsius and 750 mm Hg pressure.Calculate the volume of dry gas at S.T.P.The water vapour pressure at 17 degree celsius is 14 mm Hg?

    asked by j on May 28, 2015
  4. chemistry

    A gas 'x' is collected over water at 17 degree celcius and 750 mm pressure.If the volume of the gas collected is 50 cc then calculate the volume of the dry gas at standard temperature pressure and at 17 degree celcius the vapour

    asked by Samay on September 14, 2011
  1. chemistry

    So the question I have is: Calculate the pressure of dry hydrogen collected. (Use the water temperature). And the evidence that we obtained was: Length of magnesium 3.8Cm Mass of 1 m of magnesium 1.254g Volume of hydrogen

    asked by amy on May 10, 2017
  2. chemistry

    a cylinder filled with a movable Piston contains liquid water in equilibrium water vapour at 25 degree Celsius which one of the following operations result in a decrease in equilibrium vapour pressure

    asked by m on November 10, 2017
  3. Chemistry

    Assuming that Raoults law is followed what would be the vapour pressure of a solution formed when 40g of sugar (molecular mass 342g) is dissolved in 360ml of water at 25oC? At 250C,the vapour pressure of water is 20mm and the

    asked by Aarohi on May 30, 2017
  4. Chemistry

    What weight of solute (M,wt =60) is required to be dissolved in 180gm of water to reduce vapour pressure to 4/5th of pure water?

    asked by Jannat Sidhu From A.A.Cheema on February 1, 2013

You can view more similar questions or ask a new question.